package cn.cvs.utils;


import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

/**
 * 创建Sqlsession实例，关闭Sqlsession
 */
public class MyBatisUtil {
    private static SqlSessionFactory factory;

    static{//通过静态代码块，唯一一次创建SqlSessionFactory实例
        try {
            //String resource="mybatis-config.xml";
           // InputStream is= Resources.getResourceAsStream(resource);
            InputStream is= Resources.getResourceAsStream("mybatis-config.xml");
             factory=new SqlSessionFactoryBuilder().build(is);
        } catch (IOException e) {
            throw new RuntimeException("初始化失败",e);
        }
    }
//创建并返回SqlSession实例
    public static SqlSession createSqlSession(){
        return  factory.openSession();//关闭自动提交开启事务
    }
    //关闭sqlSession
    public static  void closeSqlSession(SqlSession sqlSession){
        if(sqlSession !=null){
            sqlSession.close();
       }
    }


}
